289622491 has 8 divisors (see below), whose sum is σ = 314700800. Its totient is φ = 265527720.

The previous prime is 289622479. The next prime is 289622513. The reversal of 289622491 is 194226982.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289622491 - 2²⁷ = 155404763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289623491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245271 + ... + 246448.

It is an arithmetic number, because the mean of its divisors is an integer number (39337600).

Almost surely, 2^289622491 is an apocalyptic number.

289622491 is a deficient number, since it is larger than the sum of its proper divisors (25078309).

289622491 is a wasteful number, since it uses less digits than its factorization.

289622491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491769.

The product of its digits is 124416, while the sum is 43.

The square root of 289622491 is about 17018.2987105057. The cubic root of 289622491 is about 661.6232549043.

The spelling of 289622491 in words is "two hundred eighty-nine million, six hundred twenty-two thousand, four hundred ninety-one".